Financial giant SBI group has declared that it's testing a crypto token to be used for retail payments over mobile devices.

The group's investment arm, SBI Holdings, that launched Japan's first bank-backed crypto exchange in June, said in a news release Tuesday that it's about to kick off a proof-of-concept trial of its "S coin" token that's based on distributed ledger technology (DLT).

Describing S coin as a "settlement coin," SBI Holdings's blockchain lead Mamoru Fujimoto and Yoshitaka Kitao, president of the company, collectively said the token will permit charging and settlement over users' smartphones.

In the trial, they explained, employees of the group will be using the firm's S Coin Platform to hold out cash-free purchases at cafes and restaurants around the firm's headquarters in Tokyo.

To allow workers to access the token, SBI Holdings installed a machine from Glory, that makes and operates automated cash devices, linking to the S-Coin Platform. Trial participants will use the machine to top up with credit card and other means, after which S coins are sent to their mobile devices via a mechanism designed by SBI.

The release hints that any future products built around the S Coin Platform might distributed in conjunction with Glory, that had total assets of nearly $3 billion in its latest financial report, saying:

"By doing this, we exchange cash with various electronic currencies and verify whether we can meet the needs of various users envisioned. After that, we will promote consideration of electronic currency settlement, such as enabling settlement with Glory's products."

The effort is also aimed at watching further prospects and use cases for DLT.

The S Coin Platform, the release further explains, was developed by SBI Holdings using DLT provided by a tech startup known as Orb. The platform allows users to "design and publish" custom cryptocurrencies for specific applications.

Orb's blockchain is built for transaction processing and management in financial and contract applications, its website indicates, touting its "high availability, quantifiability, and security in private or consortium networks."

Looking forward, Fujimoto and Kitao said SBI aims to assist build "a cashless society by providing numerous settlement infrastructure," in conjunction with Orb and Glory.